I don't have a system but I have a hammer

An hour later, the observation room...

"First of all, congratulations to you two, the operation was very successful, and based on the data obtained so far, there is no rejection reaction in the bodies of the two of you, but this is only the initial data, and it does not mean that there will be no problems in the future, so the following In a week, I wronged the two of you and stayed in the observation room..."

"Of course, during this period, the staff will observe your body's various data and conduct various tests to ensure that there will be no limb rejection or phantom pain reaction. Well, if you still have If you have any questions, you can call me with bio-slime at any time, or observe the staff outside, they are on call 24 hours a day, well, I still have something to do, so I won’t disturb your rest..."

After a short and detailed explanation, the female assistant nodded briefly, then turned around and opened the door to leave, leaving me and my second child in the observation room staring at each other...

"Second you..."

"She told us to rest..."

"... "

I have no interest in chatting, especially after I heard my second child address me as my second child, I am even less interested. The environment of the observation room is not very good. Simply put, it is about two hundred square meters The four bedrooms and two living rooms...

Since the ceilings of each room are equipped with large and small detection devices, when I first came in, I really felt like I was imprisoned in a secret room...

But that's just my overthinking...

Because we soon learned that the observation room is actually free to enter and exit, but when leaving, we must wear a full-body test suit...

Although it sounds a little troublesome, I know that if we don't bother now, it will be even more troublesome if we have health problems in the future, and at that time, whether people will care about us, maybe...

After a general glance at the environment in the observation room, I ignored the old man who was meditating with his eyes closed on the sofa. While moving his stiff and uncoordinated limbs, I walked to the translucent toilet door and used the relatively clear reflection to Scene, began to appreciate his new body with an analytical attitude...

First of all, the appearance is the same as before, of course when I say the same, I mean before the plastic surgery, but the appearance of the second child is after the plastic surgery, so obviously...

I am much more handsome than him!

The visual height should be about two meters, but the upper and lower body ratio is obviously 5:8, which is the golden ratio of the textbook level. The weight is temporarily unknown, but from the clear muscle lines and the blue veins that burst out with a little effort From the perspective of blood vessels, the body fat rate should be around 10%...

In addition, there is a thick textured film on the surface of the skin that can only be felt when you rub it. It feels a little rough and has a hint of hardness, which is a bit like a callus that has been softened by vinegar, although it feels a little rough to the touch. Weird, but this is the best protection mechanism against blows and shocks...

The other is hearing and eyesight. The former has a wider range of listening and hears more clearly...

The latter gave me the ability of night vision on the basis of enhancing myopia, but at the cost of it, the reaction to strong light is particularly poor, and the reaction to light resistance is even more unbearable...

According to preliminary estimates, the brightness of the strong light that this body can withstand will not exceed 2000-3000 lumens...

The concept of 2000 lumens is equivalent to the effect created by a magnificent museum when all the lights are turned on, while the concept of 3000 lumens is equivalent to a giant concert scene, where all the powerful lights are turned on on the stage. When the light shines on the lamp, the effect created...

That's right, 3000 lumens is nothing to ordinary people. Although 2000 lumens can directly cause blindness, it will only happen if you look directly at a close distance, or suddenly illuminate with strong light after adapting to the dark. A small probability event, under normal circumstances, as long as you close your eyes as soon as you feel the strong light, there will be no problem...

Because human eyes can withstand 4000 to 4500 or more strong light exposures depending on the individual. They can even look directly after adapting to the strong light. They are not as fragile as imagined...

However, my new body obviously cannot do this, because whenever I want to look directly at the bright light on the ceiling of the hall, the nictitating membranes on both sides of the corners of the eyes will involuntarily expand and wrap around the eyeballs to protect the pupils unharmed...

Yes, now I already have a pair of animal pupils, just like all cats, amphibians, and reptiles, not only have gained strong night vision and farsightedness, more importantly, I also have two sets of eyes ...nictitating membrane!

The nictitating membrane, also known as the third eyelid, is mainly used for cleaning, moisturizing, and color filtering…

Cleaning function, as the name suggests, once it encounters a dusty environment or a polluted environment, the nictitating membrane will act like a wiper to scrape off the dirt on the surface of the eyeball...

For example, fish or reptiles living underwater will use the nictitating membrane to prevent sand from entering the eyes...

Our human eyelids actually have this function, that is, when the eyes are stimulated by dust or dirty water, they will subconsciously blink to clean up the dirt...

But the difference is that once humans use their eyelids to clean up dirt, they must close their eyes, which is equivalent to temporarily losing their vision, but the nictitating membrane can still guarantee the vision of animals while cleaning...

In contrast, the judgement is high and low!

Of course, it can’t be said that human eyelids are bad. We can only say that we don’t have so many natural enemies, and we don’t need to pay attention to the surrounding environment all the time in order to prevent ourselves from becoming someone else’s dinner, so that we can evolve some nictitating membrane...

However, it is also possible that our ancestors actually had nictitating membranes, but they gradually degenerated later...

Plus it's moisturizing...

There are dense and small lacrimal glands on the nictitating membrane, which can secrete a large amount of tears when the eyeball is stimulated. These tears not only ensure the health and moisture of the eyeball, but also cover the surface of the eyeball to prevent foreign matter from adhering or infection...

In fact, the most representative of the ability to use eyeball moistening is the peregrine falcon. When it dives down at a speed of 320km/h, it will blink very frequently to keep the eyeball clean and moist...

Although human beings also need to keep the eyeballs moist, our lacrimal glands do not grow on the eyelids.

As for the color filter...

It can be understood as filtering harmful light. In fact, this is where the nictitating membrane is really powerful. This is also the main reason why some predators also have nictitating membranes, because the nictitating membranes of most animals are transparent, so that they can Protect their eyes without interfering with vision...

For example, snakes usually do not open their nictitating membranes when they are in a latent posture or a parade posture, because due to the angle, they will not be directly exposed to sunlight at all...

But it's different when attacking prey. At this time, they are likely to have their pupils burned by the strong light of the sun due to their sudden leap, so they must use the nictitating membrane to protect their eyes from damage...

Another example is polar bears. Since the reflectivity of snow to sunlight is extremely high, it can easily cause damage to the retina, so the nictitating membrane becomes their protective layer against ultraviolet radiation. There are many such cases, and we can know from this , what a lucky thing it is to have the nictitating membrane...

But luck is luck, creatures with nictitating membranes often have extremely poor light resistance...

For example, if my eyes are directly irradiated by a strong light of more than 3000 lumens, then there will be a glare reaction, and I will be unconscious on the spot, and the retina will be permanently damaged.

And if it is a night environment, then the probability of blindness on the spot is probably close to 100%...

But if we were humans, we wouldn’t have to worry about this. It’s nothing more than subconsciously avoiding eyes, or squinting our eyes, or raising our hands to block the light. After getting used to it for a while, we can see things normally, so this disguised form reminds me , it would be safer to turn on the nictitating membrane during the battle...